Vector borne and zoonotic diseases (Larchmont, N.Y.) · 2026
Investigation of Seroprevalence and the Risk Factors of Ehrlichia and Anaplasma Species Along the Texas-Mexico Border.
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Pinder Fernique H, Tolan Josephine, Cramer Frederick, Murry Maya, Leining Lauren M, Murray Kristy O, Erickson Timothy A, Hanis Craig L, Brown Eric L, Gunter Sarah M
Аннотация
BACKGROUND: Ehrlichiosis and anaplasmosis are emerging tick-borne bacterial zoonotic diseases resulting from infections with Ehrlichia and Anaplasma species, respectively, within the family Anaplasmataceae. These tick-borne pathogens represent a growing public health problem in the United States.
MATERIALS AND METHODS: To assess their seroprevalence and risk factors for infection along the Texas-Mexico border, we conducted a cross-sectional seroprevalence study using plasma samples obtained from 616 adults residing in Starr County, Texas. Plasma samples were screened for IgG reactivity to Ehrlichia and Anaplasma antigens using a dual-spot indirect immunofluorescent assay. Ticks were also collected from this region and tested for Anaplasmataceae DNA.
RESULTS: Seroprevalence was higher for cases of Anaplasma spp. (10.4%) than Ehrlichia spp. (4.8%) and Anaplasmataceae unspecified (6.9%). Age and gender were both significantly associated with seropositivity. PCR testing of the collected ticks revealed a 12.4% (12/97) positivity for Ehrlichia canis, all detected in Rhipicephalus sanguineus (Brown dog) ticks, but none were positive for Anaplasma species.
CONCLUSION: These findings suggested that Ehrlichia and Anaplasma species are endemic in the region and highlighted the need for ongoing surveillance and public health interventions.
MATERIALS AND METHODS: To assess their seroprevalence and risk factors for infection along the Texas-Mexico border, we conducted a cross-sectional seroprevalence study using plasma samples obtained from 616 adults residing in Starr County, Texas. Plasma samples were screened for IgG reactivity to Ehrlichia and Anaplasma antigens using a dual-spot indirect immunofluorescent assay. Ticks were also collected from this region and tested for Anaplasmataceae DNA.
RESULTS: Seroprevalence was higher for cases of Anaplasma spp. (10.4%) than Ehrlichia spp. (4.8%) and Anaplasmataceae unspecified (6.9%). Age and gender were both significantly associated with seropositivity. PCR testing of the collected ticks revealed a 12.4% (12/97) positivity for Ehrlichia canis, all detected in Rhipicephalus sanguineus (Brown dog) ticks, but none were positive for Anaplasma species.
CONCLUSION: These findings suggested that Ehrlichia and Anaplasma species are endemic in the region and highlighted the need for ongoing surveillance and public health interventions.